Tacking machine



F. POLZER TACKING MACHINE Filed Oct. 18, 1935 Aug, 10, 1937.

5Qmmummmm Fig.3.

ATTORNEYS,

Patented Aug. 10, 1937 PATENT OFFICE TACKING MACHINE Fridolin Polzer, Norwalk, Conn, assignor to The E. H. Hotchkiss Company, Norwalk, Gonn a corporation of Connecticut Application October 18, 1935, Serial No. 45,561

9 Claims.

This invention relates to new and useful improvements in staple driving machines and has particular relation to tacking machines such for example as are used for securing labels or tags 5 on boxes or the like.

' An object of the invention is to provide a'certain mechanism adapted to be mounted as a unit on a standard staple driving machine body or feed housing whereby to form a tacking machine without the necessity of making up a special body or staple feed housing thereby making it possible to keep the tool cost low. 7

Another object is to provide a staple tacking machine including a plunger; and a spring to impart staple driving movement to the plungertogether with a lever movable to shift the plunger and compress the spring and then release the plunger for actuationby the spring, in which the operating mechanism may-be'appliedasa unit to a staple driving machine'body or housing.

A further object is to provide atackingmachine including a standard staple feed housing and handle and lever means for supporting the '25 machine and operable to cause actuation of its staple driving means.

Other objects and advantages will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawing wherein'there'is shown a satisiactory embodiment of the 'invention. l-lo'wever, it is to'be understood that" the invention'is not limited to the details disclosedbut includes all such variations and'modifications as' fall within thespirit of the invention and the scope of the appended claims.

In the drawing:

Fig. l is a view partly in side elevation and partly in section showing a completemachine constructed according 'to the present invention;

Fig. 2 is a top plan view of the forward portion :of the machine but with the upper-wall broken away;.

. Fig.3 is a verticalsectional view on-an enlarged scale'through the fro'nten'd portion of the machine :and showing the plunger retractedand 'about'to be releasedto drive'a stapleyand Fig. 4 is a somewhat'similar'view also on an enlarged scale and showingthe upper-end of the plunger. in normal position .andJthe dog as it moves tonormal position after operation.

Referring in detail'to' the. drawing thenumeral .5 generally designates a standard staple .feed

housing comprising, an elongated ibodyli and a 6- head i at one end Oi $1 PQ Y- With n theibody 6 and extending into the head 1 to one side of a raceway therein is a guide bar 8 to support a staple strip 9 adapted to be moved along the bar by a follower l0 constantly urged toward the front of the body by a spring H connected to a hand piece la which is detachably connected to the follower II]. This type of staple feed is fully shown and described in my Patent Number 1,829,537 of'October 27, 1931. It is also shown in my prior application Serial Number 22,130, filed May 18, 1935 together with the spring 4 forming the front wall of the lower part of the raceway. The housing 5 is a standard type of staple feed housing, although it will beunderstood that various types of staple feed, non-clogging and staple setting devices may be used in this housing and the present invention is not limited to the construction shown.

In the present invention the housing 5 has mounted on it a unitary structure whereby a tacking machine is formed. Such structure includes a handle l2 fixed with respect'to a coverlike portion or housing l3 open at its lower side to receive the upper portion of the housing head 1. A lever l4 extends into the cover portion I3 and intermediate its ends at I5 is pivotally mounted on the handle l2. The handle 12 and lever 14 are of hollow construction substantially U-shape in cross section and open at their opposed sides, and a spring I6 is wrapped about the pivot l5 and has its arms or end portions I1 and I8 bearing against the handle and lever respectively thereby constantly tending to move them apart by rocking the lever about its pivot l5. Outward movement of the lever about its pivot is limited by engagement of the lever with the cover l3 at l9,

Before the cover I3 is placed on the head 1 the usual hand operated plunger having a hand engaging button or head is removed. Next a plunger 20 including a staple driving blade 2| is inserted into the head I and a coil spring 22 is positioned with its lower end portion in a socket in the plunger. Thereafter the cover 13' and its associated parts are applied by slipping the lower open end of the cover or lever housing over the upper end of the head and securing the cover to the head as by means of screws 23 passing transversely through the cover and head and a screw 24 passing through the front wall of the cover and threaded into the head. Cover l3 carries a stud 25 entering the upper end of the spring 22 to keep the spring in alignment with the socket in the plunger.

Figs. 1 and 4 show the plunger in its normal position as at the end of a staple driving stroke, while Fig. 3 shows the plunger in retracted position about to be released so as to be moved by the spring 22 to drive a staple. .At its upper end on its rear side plunger Zli includes a projection 26 having a lower shoulder 21 and an upper shoulder 28. The purpose of shoulder 28 will presently appear but with reference to the shoulder 21 it is here noted that the same engages screw 23 when the plunger isin its lowermost position although it will be apparent that when the driving blade is in engagement with the work further movement of the plunger by the spring 22 is.

impossible.

A dog 29 somewhat in the form of the-letter Y is pivotally mounted on the inner end portion of lever i l as by a pin 30. Such dog comprises arms SI, 32 and 33 and to the lower end of the latter there is connected one end of a small coil spring 34 having its other end anchored to a stud 35 carried by the lever. When the dog is in normal position as shown in Fig. 1 the end of arm 3! is under the plunger shoulder 28 while the end of arm 32 is against the top or-connecting portion .36 of the lever I 4. Spring 34 maintains the dog in the described position since the spring tends to move the dog in a counter-clockwise direction as the machine is viewed in Fig. 1. Movement of the dog under the influence of the spring is limited to that required'to bring the end of the arm 32again'st the portion 36 of the lever.

It is noted that normally the spring it is holding the leverl l in an upper position as shown by the full lines in Fig 1; that the spring 22- is maintaining theplunger 20 in its lowermostposition with the lower portion of the staple driving blade occupying the lower portion of the raceway and preventing a staple entering it; and that the dog 29 is positioned as above described. Now when'a staple is to be driven, as, for example, through the tag 31 and into the box 38 (Fig; 3) the lower portion of the head 1 is placed against the tag and the remainder of the lower, side-of housing 5 may or may not be'against the box depending on size, location-and the like, the operator holding the device in his hand by means of levers l2 and: I4, ordinarily with the fingers under lever I2 andthe palm of the hand on lever I4. This permits one hand operation and easy placing of the device where desired; r, Y

Next the lever I4 isdepressed or rockedin a clockwise movement about the pivot !5 as indi-" cated in dotted lines Fig.1. As this action takes place dog 29 does not turn about its pivot 30 but the dog is bodily shifted upwardly being carried by the inner end portion of the lever. Obviously as the dog is so moved it carries the plunger 20 upwardly shifting the plunger and compressing the spring 22. Staple driving blade 2] is carried upwardly with the plunger so that the lower portion of the raceway is exposed orunoccupiedand spring I! acting through follower l0 shifts the staple strip 8 forwardly so that the foremost staple of the strip is advanced into the raceway.

'Fig. 3 and :the dotted lines of Fig. 1 show the plunger at about the extreme of its upward movement. In connectionwith the movement of the plunger by the dog it is-to be noted that'the dog moves with the lever 14 since the pivot 30 is carried by such lever and since the end of the arm 32 of the dog is held against the portion 36 of the lever. As the lever approaches the limit of its movement the 'arcuate swing of the dog with the lever about pivot 55 carries the dog out from under the shoulder 23 releasing the plunger so as upper end of engages a side of the projection 25 as shown in Fig. 4 and the dog is caused to rock in a clockwise direction about pivot 36. Such movement of the dog is possible since it is held against such movement only by the spring 34. As soon as the armfil of thedog reaches the level of the shoulder 28 the dog will'be rocked back about its pivot 39 to normal position by the spring 34 and the end of arm 32will engage the lever portion 36 while the arm 31 will enter under the shoulder 28 so that the machine will be ready for the next operation.

It will be understood that the various parts may be of sheetmetal'or may be castings as desired. Further, it will be clear that the handle 12, cover I3, lever 14 andtheir associated parts are adapted to be mounted, as a unit on the head portion 7 of the housing 5. To secure such unit to the housing it is but necessary to apply the screws 23 and 24. v

The machine is neat and attractive in appear ance and easy to operate. Further it iseasily formed by assembling the handle and lever and associated partson a standard staple feed housing. Since aspecial staple feed housing is not required a considerable saving in tool cost is realized. I

Having thus set forth thenature of my invention, whatI claim is: v

g 1, In a staple driving machine, a body having ing staplesathrough the raceway, and means for feeding a staple strip towards the raceway, a lever housing having a handle projecting from one end,an operating lever pivoted in said housing,

with an operating unit comprisinga housing,

a handle extending from one side thereof, a lever pivoted in the housing, a spring for operating the plunger to drive a staple, a pawl operated by the lever toretract the plunger, and means for mounting the unit in plunger operating position i on thefirst housing.

3. A staple driving machine including a staple feed housing having an upwardly extending head, a raceway, a plunger for driving staples through the'raceway, and means for feeding staples to the raceway,'-in combination with a plunger operating unitycomprising a housing open at its lower side to receive the upper endof said head, a

handle projecting from one side of the secondhousing, a lever pivoted to this housing, a spring for operating the plunger, and a pawl operated by the lever to retract-the plunger, and means for securing .theunit to the first housing with the the head seated in the secondhousing.

. 40 a raceway, a spring operated plunger for driv- 4. In a staple driving machine, a housing including a body with a head at one end of the body having a raceway therein, a plunger movable in the raceway to drive a staple and means 5 for feeding staples to the raceway, in combination with an operating unit comprising a housing open at one side to receive and embrace the upper end of the head of the first housing, a lever pivoted to the second housing, means operated by the lever for operating the plunger, and means for securing the second housing to the first housing to secure the operating unit as such to the first housing in position to operate the plunger.

5. A staple driving machine including a staple l5 feed housing having a raceway, a plunger movable in the raceway to drive a staple, and means for feeding staples to the raceway, in combination with an operating unit comprising a housing adapted to be secured to the first housing, a 20 handle projecting from the second housing, an operating lever pivoted to the latter housing, means operated by said lever for operating the plunger, and means for securing the unit to the first housing in position to operate the plunger.

6. An operating unit for a staple driving machine including a housing adapted to be secured to a staple feed housing of a staple driving machine having a staple driving plunger, a handle projecting from one side of the first housing 30 an operating lever pivoted to said housing, and means operated by the lever for operating the plunger, and. means for mounting the unit on the second housing in plunger operating position.

7. In a staple driving machine, a housing including a body with a head at one end having a raceway therein, a plunger movable in the raceway to drive a staple and means for feeding staples to the raceway, a second housing open at its lower side embracing the upper end of the head and secured thereto, a spring bearing at one end against the plunger and at its other end' against the second housing, a lever pivoted to said second housing, and means whereby on movement of the lever in one direction the plunger is shifted to compress the spring and is then released for actuation through a staple driving movement by the spring.

8. In a staple driving machine, a housing hav ing a body with a head at one end of said body and having a raceway therein, a cover secured to said head, a plunger operable to drive a staple through said raceway, a spring bearing at one end against the plunger and at its other end against said cover, a handle rigid with said cover and extending over said body, a lever extending over said handle and pivoted to the cover, and means whereby on movement of the lever toward the handle the plunger is shifted compressing the spring and is then released for actuation through a staple driving stroke by the plunger.

9. In a staple driving machine, a housing having a body with a head at one end of the body and having a raceway therein, a cover secured to said head, a plunger operable to drive a staple through said raceway, a spring, a handle rigid with said cover, a lever extending over the handle and pivoted to the cover, means whereby on movement of the lever toward the handle the plunger is shifted and the spring compressed and the plunger is then released for actuation through a staple driving movement by the spring, and spring means between the handle and lever for returning the latter to a normal position.

FRIDOLIN POLZER. 

